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Albert Einstein. Cartoon of the Swiss-German physicist Albert Einstein (1879-1955). Einstein is best known for his paper on the special theory of relativity, which resulted in the famous equation E=mc2. Einstein was invited to the University of Oxford, UK, in May 1931 to give a series of lectures on relativity. The blackboard from the second lecture, on which he demonstrated his theory, was preserved. It is now displayed in the University's Museum of the History of Science.